Compilare: user.cpp: In function ‘void dfs(int, std::vector<int>*, int)’: user.cpp:10:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<a[nod].size(); i++){ ^ user.cpp: In function ‘int main()’: user.cpp:38:9: warning: variable ‘ordine’ set but not used [-Wunused-but-set-variable] int ordine[n+1]; ^